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Enrichment of aluminium in the near-surface region of natural quarzite rock after aluminium exposure

  • Alkali–silica reaction (ASR) is an ongoing problem that causes damage to concrete constructions and reduces their durability. Therefore, minimizing this undesired reaction is of great interest for both safety and economic reasons. Additives containing high aluminium content are very effective in reducing the release of silica and enhancing the durability of concrete; however, the mechanism for this effect is still under discussion. In this study, an enrichment of aluminium in the near-surface region was observed for natural quartzite rock after storage in Al (OH)3 and metakaolin as aluminium sources, from which we conclude that the formation of aluminosilicate sheets of a few nanometres inhibits the silica release; this hypothesis is supported by high-resolution spectra of Al 2p, Si 2p and O 1s.

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Author: Klaus-Jürgen HüngerGND, Mario Kositz, Matti Danneberg, Jörg Radnik
DOI:https://doi.org/10.1002/sia.6918
ISSN:1096-9918
Title of the source (English):Surface and Interface Analysis
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2021
Tag:X-ray photoelectron spectroscopy; alkali–silica reaction; quartzite rock
Volume/Year:53
Issue number:3
First Page:385
Last Page:391
Faculty/Chair:Fakultät 6 Architektur, Bauingenieurwesen und Stadtplanung / FG Baustoffe und Bauchemie
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